公开(公告)号：US07805038B2

公开(公告)日：2010-09-28

申请号：US10561594

申请日：2004-06-21

申请人： David Philip Williams ,  Timothy Adam Birks ,  Hendrik Sabert

发明人： David Philip Williams ,  Timothy Adam Birks ,  Hendrik Sabert

IPC分类号： G02B6/02

CPC分类号： G02B6/024 ,  B82Y20/00 ,  C03B37/01205 ,  C03B37/01217 ,  C03B37/0122 ,  C03B2203/12 ,  C03B2203/14 ,  C03B2203/16 ,  C03B2203/22 ,  C03B2203/42 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/105

摘要： A birefringent elongate waveguide for guiding light, comprises: a core region (110), comprising an elongate region of relatively low refractive index; and a cladding region (100), comprising elongate regions (105) of relatively low refractive index interspersed with elongate regions (117,120) of relatively high refractive index. In a transverse cross-section of the waveguide, a (5) relatively high refractive index boundary region (115) is provided that surrounds the core region and has either (1) at most two-fold rotational symmetry or (2) a rotational symmetry that reduces the rotational symmetry of the waveguide to at most two-fold rotational symmetry. The symmetry of the boundary region (115) results at least in part from azimuthal variations therein, which are substantially uncharacteristic of the cladding region (100).

摘要翻译： 用于引导光的双折射细长波导包括：芯区（110），包括相对低折射率的细长区域; 和包层区域（100），包括相对较低折射率的细长区域（105），散射区域具有相对较高折射率的细长区域（117,120）。 在波导的横截面中，提供了（5）相对高折射率的边界区域（115），其围绕芯区域并且具有（1）至多两个旋转对称或（2）旋转对称 这将波导的旋转对称性降低到至多两个旋转对称。 边界区域（115）的对称性至少部分地由其中的方位角变化产生，这是包层区域（100）的基本上非特性。

公开(公告)号：US07792408B2

公开(公告)日：2010-09-07

申请号：US11573401

申请日：2005-08-24

申请人： Poul Varming

发明人： Poul Varming

IPC分类号： G02B6/00

CPC分类号： G02B6/02347 ,  G02B6/02114 ,  G02B6/02361

摘要： Refractive index modifications such as e.g. Fiber Bragg gratings in micro-structured Fiber are according to an aspect of the invention fabricated by first filling and/or purging the holes of the micro-structured fiber with inert gas or by evacuation and, optionally subsequently scaling the ends. Alternatively, the ends of the micro-structured fiber may be sealed without a preceding purging or evacuation of the holes. In this way hydrogen or deuterium present in the holes after photosensitizing loading will not react with atmospheric oxygen to form water. Water formed this way would otherwise seriously impair the grating formation process. Bragg gratings and other refractive index structures can thus be fabricated with high quality and predictable specifications in micro-structured fiber. Sealing the fiber ends also prevents in-diffusion of moisture. The invention may e.g. find application in connection with fiber optical sensors, high-power fiber lasers, etc.

摘要翻译： 折射率修饰例如。 微结构纤维中的光纤布拉格光栅根据本发明的一个方面，其通过首先用惰性气体填充和/或清除微结构纤维的孔或通过抽空和任选地随后对其端部进行缩放制造。 或者，微结构化纤维的端部可以在没有孔的先前吹扫或排空的情况下被密封。 以这种方式，光敏加载后存在于孔中的氢或氘将不会与大气氧反应形成水。 这样形成的水将会严重影响光栅的形成过程。 因此，布拉格光栅和其他折射率结构可以在微结构化纤维中以高质量和可预测的规格制造。 密封纤维端也可防止水分的扩散。 本发明可以例如 应用于光纤光传感器，大功率光纤激光器等。

公开(公告)号：US07787503B2

公开(公告)日：2010-08-31

申请号：US10583961

申请日：2004-12-22

申请人： William Wadsworth

发明人： William Wadsworth

IPC分类号： H01S3/30

CPC分类号： G02F1/365 ,  G02F1/353 ,  G02F1/395 ,  G02F2001/3528 ,  G02F2201/02 ,  G02F2202/32 ,  H01S3/0627

摘要： The light includes a laser (4), which operates at or near its fundamental wavelength and produces pulses of a duration longer than 0.5 ns, and a micro-structured optical fibre (9) arranged to guide the pulses, wherein the light is generated by the pulses in the fibre (9). The light source may e.g. be useful in applications such as spectral testing of fibre components and spectral analysis of chemical and biological samples.

摘要翻译： 该光包括在其基本波长处或其附近工作的激光器（4），并产生持续时间大于0.5ns的脉冲;以及布置成引导脉冲的微结构光纤（9），其中光源由 光纤中的脉冲（9）。 光源可以例如。 可用于诸如光纤组件的光谱测试和化学和生物样品的光谱分析等应用。

公开(公告)号：US20240272515A1

公开(公告)日：2024-08-15

申请号：US18631570

申请日：2024-04-10

申请人： NKT Photonics A/S

发明人： Carsten L. THOMSEN

IPC分类号： G02F1/365 ,  A61B1/06 ,  G02B6/02 ,  G02B6/42 ,  G02B6/44 ,  G02F1/35 ,  H01S3/30

CPC分类号： G02F1/365 ,  A61B1/06 ,  G02B6/0006 ,  G02B6/02319 ,  G02B6/02342 ,  H01S3/302 ,  G02B6/02333 ,  G02B6/4296 ,  G02B6/44382 ,  G02F1/3528

摘要： A method of making a microstructured optical fiber including loading the core and cladding materials of the fiber with hydrogen and deuterium at a loading temperature; annealing the fiber at a selected temperature Tanneal; pumping the fiber with radiation; and reducing the temperature of the fiber and storing the fiber at the reduced temperature before the step of pumping the fiber; and wherein the method allows the hydrogen and the deuterium to become bound to the core material and the cladding material.

公开(公告)号：US20240219295A1

公开(公告)日：2024-07-04

申请号：US18555438

申请日：2022-04-11

申请人： NKT Photonics A/S

发明人： Peter Moselund ,  Rasmus Engelsholm ,  Erik Nicolai Christensen

IPC分类号： G01N21/17 ,  G02F1/365

CPC分类号： G01N21/1702 ,  G02F1/365 ,  G01N2021/1706 ,  G01N2201/06113 ,  G01N2201/088

摘要： Disclosed is an optical system for monitoring a parameter, such as a density or a pressure, of a fluid, in particular a gas or a mixture of gases, in a hollow core of an optical fiber, wherein the optical system comprises: an optical fiber which comprises a hollow core that is filled with a fluid, a pulsed laser for providing pulsed laser light, which is input into a first end of the optical fiber such that the laser light propagates through the hollow core from the first end to a second end of the fiber, wherein the pulsed laser light is configured to induce nonlinear processes by interacting with the fluid in the hollow core, and wherein the optical system further comprises a monitoring device for detecting acoustic vibrations in the fiber and for determining a parameter of the fluid based on the acoustic vibrations.

公开(公告)号：US20240201562A1

公开(公告)日：2024-06-20

申请号：US18555408

申请日：2022-04-11

申请人： NKT Photonics A/S

发明人： Peter Moselund

IPC分类号： G02F1/365 ,  G02F1/35

CPC分类号： G02F1/365 ,  G02F1/3528

摘要： A fiber arrangement, in particular for providing broadband light, preferably in the ultraviolet frequency range, comprises: a hollow core optical fiber (11), and at least one housing (15) having a chamber (27) in which a piezo device (25) is arranged, the piezo device (25) having a variable length and the chamber (27) being in fluid communication with a hollow core (13) of the fiber (11) such that a change of length of the piezo device (25) causes a change of the size of a volume (23) which is provided by the hollow core (13) and the chamber (27) for a fluid, such as a gas or a mixture of gases.

公开(公告)号：US11977255B2

公开(公告)日：2024-05-07

申请号：US18301648

申请日：2023-04-17

申请人： NKT Photonics A/S

发明人： Jens Kristian Lyngsøe ,  Christian Jakobsen ,  Mattia Michieletto

IPC分类号： G02B6/02 ,  G02B6/42

CPC分类号： G02B6/02328 ,  G02B6/02338 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/4206 ,  G02B6/4296

摘要： A hollow core photonic crystal fiber (PCF) including an outer cladding region and seven hollow tubes surrounded by the outer cladding region. Each of the hollow tubes is fused to the outer cladding to form a ring defining an inner cladding region and a hollow core region surrounded by the inner cladding region. The hollow tubes are not touching each other but are arranged with distance to adjacent hollow tubes. The hollow tubes each have an average outer diameter d2 and an average inner diameter d1, wherein d1/d2 is equal to or larger than about 0.8, such as equal to or larger than about 0.85, such as equal to or larger than about 0.9. Also, a laser system.

公开(公告)号：US20240106198A1

公开(公告)日：2024-03-28

申请号：US18326298

申请日：2023-05-31

申请人： NKT PHOTONICS A/S

发明人： Jens E. PEDERSEN ,  Poul VARMING ,  Christian V. POULSEN ,  Thomas O. FAGERHØJ ,  Bjarke GØTH ,  Henrik SØRENSEN

IPC分类号： H01S5/0687 ,  G01B9/02001 ,  H01S3/23 ,  H01S5/02251 ,  H01S5/065 ,  H01S5/14

CPC分类号： H01S5/0687 ,  G01B9/02001 ,  H01S3/2391 ,  H01S5/02251 ,  H01S5/0654 ,  H01S5/141 ,  H01S5/4087

摘要： A laser device includes a laser configured to generate laser light and a laser control module configured to receive at least a portion of the laser light generated by the laser, to generate a control signal and to feed the control signal back to the laser for stabilizing the frequency, wherein the laser control module includes a tunable frequency discriminating element which is preferably continuously frequency tunable, and where the laser control module is placed outside the laser cavity.

公开(公告)号：US20230384512A1

公开(公告)日：2023-11-30

申请号：US18326562

申请日：2023-05-31

申请人： NKT PHOTONICS A/S

发明人： Johannes WEIRICH ,  Martin Dybendal MAACK

IPC分类号： G02B6/02 ,  G02B6/024 ,  A61B5/00 ,  G01B9/02091 ,  G02B6/28 ,  G02B6/293 ,  G02B21/00 ,  G02B23/24

CPC分类号： G02B6/02357 ,  G02B6/02347 ,  G02B6/024 ,  A61B5/0066 ,  G01B9/02091 ,  G02B6/02361 ,  G02B6/2821 ,  G02B6/2938 ,  G02B6/29389 ,  G02B21/0032 ,  G02B23/2469 ,  H01S3/2308

摘要： A delivery fiber assembly suitable for delivering broad band light and including a delivery fiber and a connector member. The delivery fiber has a length, an input end for launching light, and a delivery end. The delivery fiber includes along its length a core region and a cladding region surrounding the core region, the cladding region includes a cladding background material having a refractive index Nbg and a plurality of microstructures in the form of inclusions of solid material having refractive index up to Ninc and extending in the length of the longitudinal axis of the delivery fiber, wherein Ninc

公开(公告)号：US20230305222A1

公开(公告)日：2023-09-28

申请号：US18320911

申请日：2023-05-19

申请人： NKT Photonics A/S

发明人： Jens LYNGSØ ,  Cameron SMITH ,  Anders HARPØTH ,  Christian JAKOBSEN ,  Thomas Tanggard ALKESKJOLD ,  Irnis KUBAT

IPC分类号： G02B6/02 ,  G02F1/365

CPC分类号： G02B6/02338 ,  G02B6/02342 ,  G02F1/365 ,  C03B2201/12 ,  C03B2201/22 ,  C03B2201/28 ,  C03B2201/32 ,  G02F1/3528

摘要： A supercontinuum source including a pump source and a supercontinuum generator configured for receiving electromagnetic radiation derived from the pump source and for generating supercontinuum radiation, the supercontinuum generator including a nonlinear microstructured optical fibre having a core region comprising silica. The core region includes a dopant selected to reduce light-induced non-bridging oxygen hole centre loss in the nonlinear microstructured optical fibre.